feat: Explicitly throw UnknownColumnNameError in `TaggedTable._from…

…_table` (#334)

Closes #333.

### Summary of Changes

Explicitly throw `UnknownColumnNameError` in `TaggedTable._from_table`
for a more readable stacktrace.
Document when this exception is thrown.

Co-authored-by: Alexander <[email protected]>

src/safeds/data/tabular/containers/_tagged_table.py

@@ -3,6 +3,7 @@
 from typing import TYPE_CHECKING
 
 from safeds.data.tabular.containers import Column, Table
+from safeds.exceptions import UnknownColumnNameError
 
 if TYPE_CHECKING:
     from collections.abc import Mapping, Sequence
@@ -67,6 +68,8 @@ def _from_table(
 
         Raises
         ------
+        UnknownColumnNameError
+            If target_name matches none of the column names.
         ValueError
             If the target column is also a feature column.
         ValueError
@@ -78,11 +81,13 @@ def _from_table(
         >>> table = Table({"col1": ["a", "b", "c", "a"], "col2": [1, 2, 3, 4]})
         >>> tagged_table = TaggedTable._from_table(table, "col2", ["col1"])
         """
+        if target_name not in table.column_names:
+            raise UnknownColumnNameError([target_name])
+
         # If no feature names are specified, use all columns except the target column
         if feature_names is None:
             feature_names = table.column_names
-            if target_name in feature_names:
-                feature_names.remove(target_name)
+            feature_names.remove(target_name)
 
         # Validate inputs
         if target_name in feature_names: